问题补充:
I don’t know if to the party. I will let you know if .
A. he will come; he comes
B. he will come; he will come
C. he comes; he comes
D. he comes; he will come
答案:
(答案→)A. he will come; he comes
B. he will come; he will come
C. he comes; he comes
D. he comes; he will come
解析:句意:我不知道他是否会来参加聚会,如果他来的话,我会告诉你的。第一个空前的if是是否的意思,引导宾语从句,根据句意可知,这里表示将来的事情,故从句中用一般将来时;第二个空前的if是如果的意思,引导条件状语从句,从句中用一般现在时,主句用一般将来时。故选A。